Abstract: A voltage isolation device for controlling the flow of conductive liquid between a liquid supply source and a liquid destination source. The isolation device has an inlet connected to the supply source and has a yoke slide valve positionable along a pair of rods; one of the rods engages a slideable tube at the inlet to provide a liquid seal and the yoke slide valve may be positionable to slide the tube away from the rod to thereby provide a flow path for liquid through the tube and out the slide valve. A pair of seal assemblies each having axially spaced apart seals have formed sealing areas containing a non-conductive seal liquid which is capable of dissolving the conductive liquids being utilized. A scheme is provided to route arcs which result when the charged fluid is connected to the grounded fluid so as to locate the arc away from parts which could be damaged by it.

Abstract: An improvement in reciprocable liquid pump construction to facilitate maintenance and repair of certain high-wear pump components without the necessity of removing the pump from the work site. The pump has a threadable and removable cylinder, intake housing, piston, piston packing and glands, piston and inlet ball checks and seats, and ball check housings.

Abstract: The power unit cart of the present invention provides for the quick, efficient, and easy replacement of either an engine or an electrical motor power unit as the power source for a cart-mounted spray painting pumping system. The power unit cart includes a main frame which has a partial tubular socket and an axial alignment member having a vertical support tab. The axial alignment member and the partial tubular socket pivotally and slidably engage a universal mounting base which includes a tubular member and an L-shaped bracket. The power unit is attached to the upper face of the universal mounting base. The axial alignment member and the partial tubular socket, in conjunction with an anchoring device, releasably and adjustably couple the universal mounting base and power unit to the power unit cart. The anchoring device is then attached to the L-shaped bracket for adjustment of the tension of a belt drive.

Abstract: A paint circulation system for supplying paint to a plurality of distributors utilizing a circulating pump to circulate paint to the distributors and an injection pump operated by a closely controlled electric motor for injecting paint into the circulation network from a paint supply reservoir to maintain a predetermined pressure within the circulation network. A "leakage" passage having a predetermined restriction permits paint to leave the circulation network when the valved paint distributors are closed, and the use of an automatic timing valve within the leakage bypass permits flow rates within the circulation network to be varied. The components permit paint viscosity and volumes to be determined, settling of the paint particles within the circulation network and degradation of the circulating paint is minimized, and circulating motor wear may be determined.

Abstract: In a priming piston loading double acting pump for high viscosity materials, the shovel plate assembly is formed of a flexible, abrasion resistant disk or cup. The disk may be made from silicon rubber and the cup may be made from a glass filled Teflon polytetrafluoroethylene material. The clearance between the plate assembly and the intake cylinder is essentially zero to allow for a build-up of a vacuum as the plate assembly moves downwardly and out of the intake cylinder to greatly enhance the loading ability of the pump.

Abstract: The dispense valve is designed for application of high viscosity fluids and is designed so that it is equally effective and usable in manual or automatic versions. The valve is air operated and the air section and fluid sections may be swiveled relative to one another to allow the inlet lines to be aligned in the desired manner relative to one another. The seat against which the needle seals is designed to be reversible to effectively double the life of the single part. Also, the trigger valve attaches directly to the valve itself so as to allow ease of attachment and detachment. The complete assembly provides a compact, easily maneuverable and effective device.

Abstract: A liquid dispensing and control system having dispensing nozzles positioned for dispensing into a receptacle on a weight-sensing device, where all dispensing nozzles are respectively coupled to liquid pumps for delivering liquids from different containers to the nozzles, and a control computer connected to the weight-sensing device and to the pumps and dispensing nozzles to control the flow rate and delivery of liquids.

Abstract: The nozzle swivel joint includes two couplings which are joined together at mutually flat interface surfaces. Each coupling has an axial flow passage, and the two couplings are held together in mutually rotatable position by a manifold with a threaded end; the manifold having inlet and outlet ports respectively aligned to the flow passages in the couplings. The manifold is sealably affixed to one of the couplings, with a gasket forming a seal about the threadable manifold. An O-ring is compressed between the respective flat interface surfaces to provide a limited friction seal for restricting relative rotation between the couplings, while at the same time permitting rotation to occur with a limited amount of force.

Abstract: This invention is useful in a plural component system which utilizes sequential metering of multiple fluids. In such a system for dispensing component fluids such as paint, the controller dispenses a given amount of a first fluid, and then part way through dispensing of the second fluid, calculates the amount of the second fluid required in view of the actual amount of the first fluid dispensed and then dispenses that amount. The desired tolerance maybe subtracted from the amount of second fluid dispensed so that the overrun which always takes place from the valves on the second fluid will place the mixture in the middle of the range for the dispensed fluid. During subsequent cycles, the ratio is checked in view of the actual amounts dispensed and an alarm set off if the actual ratio falls outside of tolerance.

Abstract: This invention represents an improvement in a standard four ball reciprocating piston pump. Such pumps utilize a greatly enlarged seat to provide hydraulic cushioning of the check balls in order to greatly quiet operation. A seat width on the order of 6% of the ball's circumference is preferred. Closely confining the ball to the axis of the seat helps efficient and quiet operation.

Abstract: A stripe painting apparatus is attachable to square opening hitch receivers mounted on the rear of a pickup truck or other vehicle. The apparatus includes a transverse tubular sleeve in which a boom may be slidably locked to extend outwardly to the left or right. A forwardly extending carriage with a wheeled front end pivots on the boom and carries paint spray heads and applicators for distributing reflective beads onto the wet paint. The carriage pivots between a lower operating position and a locked upright position for highway transport. A pair of crankable jacks with elongate feet mounted on the jack legs are cranked down for ground support during mounting and removal of the apparatus from the vehicle, and for storage of the apparatus. A line guide mounts at any location of a steel vehicle body, enabling one-person operation of the apparatus from the driver's seat using a remote control box.

Abstract: A double diaphragm pump operated by selectively switching pressurized air into either of two diaphragm chambers; the air actuator valve is a cup valve which is slidable over orifices in a valve plate, and actuable by air pistons; the air pistons are coupled via passageways to a pilot valve which is a second cup valve slidable over orifices in a valve plate, the cup valve being actuable by pins extending into the diaphragm chambers and into contact with diaphragm members at predetermined positions.

Abstract: An external air valve for a reciprocating air motor is provided with a the ability to transfer heat from incoming compressed air into the valve cups to prevent icing and a low friction mechanism for the valve slide to enhance reliability. The design has a housing which forms an air chamber, and located in the air chamber is a slide member containing two cups which alternately cover ports leading to the upper and lower chambers of the air motor piston. The slide has slotted rollers to reduce pneumatic loading and decrease friction during sliding. The shift rod is provided with a central valve spring located in an aperture in the slide, along with spring retaining plates to provide and assist in shifting the valve in conjunction with a detent to assure that the valve is positioned in one of two operating positions. The pressurized chamber, in conjunction with fins, apertures and other heat transfer apparatus in the slide assures that heat is applied to the cups of the slide in order to prevent icing.

Abstract: A liquid pumping system for transporting conductive liquids to an electrostatic spraying device while maintaining electrical isolation between the spraying device and the liquid source; the system includes sequentially-arranged metering valves and pumps to sequentially transport predetermined and isolated quantities of liquid.

Abstract: A ram assembly is designed for evacuating "bag-in-a-box" square bulk containers of viscous materials. The ram cylinder is centered over the bulk container and mounted so as to float relative to the frame allowing accomodation of various containers. An inflatable wiper seal is used in conjunction with elastomeric corner seals to tightly seal the corners.

Abstract: A rotary agitator with a concentric suction tube suspended from a housing which has a seal connection for attachment to a drum or other large container. The suction tube is fixedly mounted within the housing and includes a flow path extending from a bottom end below the rotary agitator and to a top end above the rotary agitator. A drive motor is affixed to the housing and is coupled to the rotary agitator by a belt drive and pulley attachment to the exterior walls of the agitator tube; the lower portion of the agitator tube having a helical screw for immersion into the liquid contained in the drum or container.

Abstract: A liquid pump adapted for pumping liquids containing high percentages of solids in suspension, including a foot valve and pumping chamber, and having an insert in the pumping chamber adjacent the foot valve seat, the insert having a resilient inner surface and an outer metallic rim, the inner resilient surface forming flanges about the edges of the rim, and the insert being clamped between the valve seat and another member.

Abstract: A nozzle for use in a foam gun is designed so that the ports for the two materials both enter the flow passage in the same plane. This serves to eliminate lead/lag flow conditions which result in portions of the material being off-ratio. Counterbored or milled slots encircle the angled sealing surface with the slots machined in from alternating edges of the surface communicating with the respective flow passages for the two (or more) materials.

Abstract: A liquid-atomizing spray gun having an improved nozzle construction for spraying liquids under predetermined hydraulic pressures, and with the assistance of carbon dioxide gases, wherein the nozzle includes a forwardly-projecting shield having ports directed toward the atomized spray pattern emanating from a spray tip. The nozzle also includes ports for ejecting CO.sub.2 gas for assisting in the atomization process, the overall design providing CO.sub.2 -assisted hydraulic spraying and preventing air entrainment into the atomized particles in the region proximate the spray nozzle.

Abstract: A liquid pumping system adaptable for connection to either an electrical drive motor or an internal combustion engine, wherein a generator and clutch is coupled to the driving source, and a pressure sensing switch is connected to the generator rotor to selectively provide voltage to a rectifier circuit and field winding for the clutch. The energization of the field winding causes the clutch to actuate and thereby causes a mechanical coupling to a reciprocable pump for developing liquid pressure.